Suscetibilidade de cultivares de arroz irrigado (Oryza sativa) à deriva simulada do herbicida imazethapyr + imazapic

Magro, Taísa Dal; Pinto, J.J.O.; Agostinetto, Dirceu; Galon, Leandro; Rezende, Adilson Lemos; Lazarotto, C.A.

doi:10.1590/s0100-83582006000400016

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…Only rates of 400 g ha -1 was able to control more than 80% of rice plants. The increase of Kifix herbicide rates results in increasing phytotoxicity of rice plants (Dal Magro et al, 2006). The need to increase rates of Kifix could be because the recommendation is to apply the herbicide when weeds or target plants are at 2 to 4 leave stage (BASF, 2017).…”

Section: Controlling Non-resistance Rice Plants After Pollinationmentioning

confidence: 99%

Application of herbicides on parental lines (A clearfield® and R) of hybrid rice at post-flowering stage for production

Mondo¹,

Nascente²

2019

Aust J Crop Sci

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The hypothesis of this study is based on the fact that parental line A-Clearfield® (male-sterile genotype) (Clearfield provide has tolerance to imidazolinone herbicides) and line R (male-fertile genotype-pollinator) is sensitive to the herbicide. So after flowering, we may apply an imidazolinone herbicide (Kifix®) to the plantings to kill line R, and harvesting only the hybrid seeds. The objective was to test the use of imidazolinone herbicide on parental lines (A-Clearfield® which is resistant to Kifix herbicide) and R no Clearfield® (non-resistant to Kifix genotype) as a strategy to improve production of hybrid seed in rice. Two trials were conducted to evaluate (A) the use of doses of imidazolinone herbicide in line R (plant control, number of grains per panicles, grain yield and seed germination; and (B) the use of different doses of imidazolinone herbicide in line A Clearfield® grain yield and seed germination. Trials were conducted in the tropical region of Brazil in randomized complete block design in factorial scheme 5 x 2 x 2. The treatments were the combination of five Kifix (Imazapyr, 525 g kg-1 + Imazapic, 175 g kg-1) rates applied on two no Clearfield® rice genotypes (first trial) or Clearfield® rice genotypes (second trial) in two growing seasons. The results showed application of herbicide doses higher than 150 g ha-1 after full flowering stage can cause reduction in growth and development of no Clearfield® rice. The use of Kifix herbicide in CL (Clearfield®) rice cultivars did not affect the grain yield, mass of 1000 grains, seed germination, first count germination, seedling emergence and seedling length. New researches should be done to define plant arrangement suitable for line R (no Clearfield®) and line A Clearfield® to find the optimum condition to produce hybrid seeds. From our results, we could see that the use of parental line A Clearfield® with a line R no Clearfield®, after flowering, provided the production of only hybrid seeds in the area, without reduction in seed quality.

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Section: Controlling Non-resistance Rice Plants After Pollinationmentioning

confidence: 99%

Application of herbicides on parental lines (A clearfield® and R) of hybrid rice at post-flowering stage for production

Mondo¹,

Nascente²

2019

Aust J Crop Sci

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Controle de arroz-vermelho (Oryza sp.) com o herbicida nicosulfuron ou a mistura formulada de imazethapyr + imazapic

Fontana

Agostinetto²,

Pinto³

et al. 2007

Planta daninha

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RESUMO -Foi avaliada a eficácia no controle de arroz-vermelho com o herbicida nicosulfuron ou a mistura formulada de imazethapyr + imazapic. O experimento foi conduzido em casa de vegetação da Faculdade de Agronomia Eliseu Maciel (UFPel), no município de Capão do Leão (RS), na estação de crescimento 2005/06, em delineamento experimental de blocos ao acaso, com quatro repetições. Os tratamentos foram arranjados em esquema fatorial 2 x 7, sendo o fator A os herbicidas e o fator B as doses dos herbicidas (0, 0,25, 0,50, 0,75, 1,0, 1,25 e 1,50 L ha -1 ). A aplicação foi feita sobre as plantas de arroz-vermelho em estádio de desenvolvimento V 4 . As variáveis analisadas foram controle, estatura da planta e massa seca da parte aérea. Para as variáveis respostas foi verificada interação significativa entre os fatores estudados. Incrementos nas doses dos herbicidas resultaram em resp ostas crescentes de controle, com redução na taxa de crescimento das plantas e produção de massa seca da parte aérea. Os resultados mostraram que o arroz-vermelho é controlado pelos herbicidas testados. A eficácia de controle não é restrita à mistura formulada de imazethapyr + imazapic, ocorrendo também com o herbicida nicosulfuron a partir de 40 g ha -1 .Palavras-chave: arroz irrigado, inibidor de ALS, imidazolinona, sulfoniluréia. (0, 0.25, 0.50, 0.75, 1.0, 1.25 and 1.50 L ha -1 ABSTRACT -Red rice control efficacy using nicosulfuron or a formulated mixture of imazethapyr + imazapic was evaluated. A greenhouse experiment was carried out at Faculdade de Agronomia Eliseu Maciel (UFPel) in Capão do Leão (RS), during the 2005/2006 growing season, in a randomized complete block design and four replications. Treatments were arranged in a 2 x 7 factorial, with factor A being the herbicides and factor B the herbicide rates

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Tolerância de cultivares de arroz irrigado (Oryza sativa) ao herbicida nicosulfuron e à mistura formulada de imazethapyr + imazapic

Fontona¹,

Agostinetto²,

Pinto³

et al. 2007

Planta daninha

Self Cite

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RESUMO -O objetivo deste estudo foi avaliar a tolerância de cultivares de arroz irrigado ao herbicida nicosulfuron e à mistura formulada de imazethapyr + imazapic. Para isso, foram conduzidos experimentos em casa de vegetação da Faculdade de Agronomia Eliseu Maciel (UFPel), no município de Capão do Leão (RS). Os tratamentos constaram de dois cultivares de arroz irrigado (IRGA 417 e IRGA 422CL) e de sete doses dos herbicidas imazethapyr + imazapic e nicosulfuron, aplicados em arroz (estádios de desenvolvimento V 2 ou V 4 ). As variáveis analisadas foram fitotoxicidade dos herbicidas, estatura de planta, massa seca da parte aérea e área foliar. Houve interações significativas entre os fatores estudados para as variáveis-respostas avaliadas. Incrementos nas doses dos herbicidas resultaram em respostas crescentes de fitotoxicidade ao arroz, resultando em redução no crescimento das plantas. O cultivar IRGA 417 foi suscetível à ação dos herbicidas. Por sua vez, a tolerância do cultivar IRGA 422CL não é restrita à mistura formulada de imazethapyr + imazapic, ocorrendo também para o herbicida nicosulfuron.Palavras-chave: imidazolinona, sulfoniluréia, inibidores da ALS, IRGA 422CL, IRGA 417. ('IRGA 417' and 'IRGA 422CL') ABSTRACT -The objective of this study was to evaluate the tolerance of rice cultivars to the formulated mixture of nicosulf uron and imazethapyr + imazapic. Greenhouse experiments were carried out at the Faculdade de Agronomia Eliseu Maciel (UFPel) in Capão do Leão (RS). The treatments consisted of two rice cultivars

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Suscetibilidade de cultivares de arroz irrigado (Oryza sativa) à deriva simulada do herbicida imazethapyr + imazapic

Abstract: -

Cited by 5 publications

References 6 publications

Application of herbicides on parental lines (A clearfield® and R) of hybrid rice at post-flowering stage for production

Application of herbicides on parental lines (A clearfield® and R) of hybrid rice at post-flowering stage for production

Controle de arroz-vermelho (Oryza sp.) com o herbicida nicosulfuron ou a mistura formulada de imazethapyr + imazapic

Tolerância de cultivares de arroz irrigado (Oryza sativa) ao herbicida nicosulfuron e à mistura formulada de imazethapyr + imazapic

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